Portion of a battery pack



FIG. 1 is a front perspective view of a portion of a battery pack showing our new design;

FIG. 2 is a bottom plan view of the portion;

FIG. 3 is a left side elevational view of the portion; and,

FIG. 4 is a right side elevational view of the portion.

In the above drawings, any broken line illustration is not part of the design sought to be patented. In addition, any views not shown thereof do not form a part of the invention. 

The ornamental design for a portion of a battery pack, as shown and described. 